Well if like me, you loved Limbo, there's no reason why you won't like this game. Aside from a bit of a graphical upgrade, it plays the same.
There are puzzles spread out over periods of just walking/swimming and while my memory is failing me here, I think the puzzles in Limbo were a bit more difficult. I don't think any puzzle here really gave me much trouble.
The game is pretty short and you can probably be finish it in a sitting or two but if you're looking to get more bang for your buck, just remember you're also getting a nice experience. There will be scenes here that you will likely remember for a while. I've paid more for games that were worse.
I paid half price when the game went on sale during the holidays and that price seemed about right. I think the current asking price of around $25.00 is a bit much for what you get. So unless you got cash falling out your backside, wait for the inevitable sale or bundling on disc with other games.
There's some trophies and an alternate ending you can go back to but they don't offer that much replayability.